From mboxrd@z Thu Jan 1 00:00:00 1970 From: Haoran Li Subject: [RTDS Patch v2 for Xen4.8] xen: rtds: only tickle non-already tickled CPUs Date: Fri, 24 Feb 2017 15:54:37 -0600 Message-ID: <1487973277-20854-1-git-send-email-naroahlee@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Received: from mail6.bemta5.messagelabs.com ([195.245.231.135]) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1chNpB-0006x5-S3 for xen-devel@lists.xenproject.org; Fri, 24 Feb 2017 21:54:50 +0000 Received: by mail-io0-f196.google.com with SMTP id w10so191204iod.3 for ; Fri, 24 Feb 2017 13:54:47 -0800 (PST) List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xen.org Sender: "Xen-devel" To: xen-devel@lists.xenproject.org Cc: dario.faggioli@citrix.com, mengxu@cis.upenn.edu, naroahlee List-Id: xen-devel@lists.xenproject.org RnJvbTogbmFyb2FobGVlIDxuYXJvYWhsZWVAZ21haWwuY29tPgoKQnVnIEFuYWx5c2lzOgpXaGVu IG1vcmUgdGhhbiBvbmUgaWRsZSBWQ1BVcyB0aGF0IGhhdmUgdGhlIHNhbWUgUENQVSBhcyB0aGVp cgpwcmV2aW91cyBydW5uaW5nIGNvcmUgaW52b2tlIHJ1bnFfdGlja2xlKCksIHRoZXkgd2lsbCB0 aWNrbGUgdGhlIHNhbWUKUENQVS4gVGhlIHRpY2tsZWQgUENQVSB3aWxsIG9ubHkgcGljayBhdCBt b3N0IG9uZSBWQ1BVLCBpLmUuLCB0aGUKaGlnaGVzdC1wcmlvcml0eSBvbmUsIHRvIGV4ZWN1dGUu IFRoZSBvdGhlciBWQ1BVcyB3aWxsIG5vdCBiZQpzY2hlZHVsZWQgZm9yIGEgcGVyaW9kLCBldmVu IHdoZW4gdGhlcmUgaXMgYW4gaWRsZSBjb3JlLCBtYWtpbmcgdGhlc2UKVkNQVXMgdW5uZWNlc3Nh cmlseSBzdGFydmUgZm9yIG9uZSBwZXJpb2QuClRoZXJlZm9yZSwgYWx3YXlzIG1ha2Ugc3VyZSB0 aGF0IHdlIG9ubHkgdGlja2xlIFBDUFVzIHRoYXQgaGF2ZSBub3QKYmVlbiB0aWNrbGVkIGFscmVh ZHkuCi0tLQogeGVuL2NvbW1vbi9zY2hlZF9ydC5jIHwgMjYgKysrKysrKysrKysrLS0tLS0tLS0t LS0tLS0KIDEgZmlsZSBjaGFuZ2VkLCAxMiBpbnNlcnRpb25zKCspLCAxNCBkZWxldGlvbnMoLSkK CmRpZmYgLS1naXQgYS94ZW4vY29tbW9uL3NjaGVkX3J0LmMgYi94ZW4vY29tbW9uL3NjaGVkX3J0 LmMKaW5kZXggMWIzMDAxNC4uMDEyOTc1YyAxMDA2NDQKLS0tIGEveGVuL2NvbW1vbi9zY2hlZF9y dC5jCisrKyBiL3hlbi9jb21tb24vc2NoZWRfcnQuYwpAQCAtMTE0NCw5ICsxMTQ0LDEwIEBAIHJ0 X3ZjcHVfc2xlZXAoY29uc3Qgc3RydWN0IHNjaGVkdWxlciAqb3BzLCBzdHJ1Y3QgdmNwdSAqdmMp CiAgKiBDYWxsZWQgYnkgd2FrZSgpIGFuZCBjb250ZXh0X3NhdmVkKCkKICAqIFdlIGhhdmUgYSBy dW5uaW5nIGNhbmRpZGF0ZSBoZXJlLCB0aGUga2ljayBsb2dpYyBpczoKICAqIEFtb25nIGFsbCB0 aGUgY3B1cyB0aGF0IGFyZSB3aXRoaW4gdGhlIGNwdSBhZmZpbml0eQotICogMSkgaWYgdGhlIG5l dy0+Y3B1IGlzIGlkbGUsIGtpY2sgaXQuIFRoaXMgY291bGQgYmVuZWZpdCBjYWNoZSBoaXQKLSAq IDIpIGlmIHRoZXJlIGFyZSBhbnkgaWRsZSB2Y3B1LCBraWNrIGl0LgotICogMykgbm93IGFsbCBw Y3B1cyBhcmUgYnVzeTsKKyAqIDEpIGlmIHRoZXJlIGFyZSBhbnkgaWRsZSB2Y3B1LCBraWNrIGl0 LgorICogICAgRm9yIGNhY2hlIGJlbmVmaXQsIHdlIGZpcnN0IHNlYXJjaCBuZXctPmNwdS4KKyAq ICAgICAKKyAqIDIpIG5vdyBhbGwgcGNwdXMgYXJlIGJ1c3k7CiAgKiAgICBhbW9uZyBhbGwgdGhl IHJ1bm5pbmcgdmNwdXMsIHBpY2sgbG93ZXN0IHByaW9yaXR5IG9uZQogICogICAgaWYgc25leHQg aGFzIGhpZ2hlciBwcmlvcml0eSwga2ljayBpdC4KICAqCkBAIC0xMTc0LDE3ICsxMTc1LDExIEBA IHJ1bnFfdGlja2xlKGNvbnN0IHN0cnVjdCBzY2hlZHVsZXIgKm9wcywgc3RydWN0IHJ0X3ZjcHUg Km5ldykKICAgICBjcHVtYXNrX2FuZCgmbm90X3RpY2tsZWQsIG9ubGluZSwgbmV3LT52Y3B1LT5j cHVfaGFyZF9hZmZpbml0eSk7CiAgICAgY3B1bWFza19hbmRub3QoJm5vdF90aWNrbGVkLCAmbm90 X3RpY2tsZWQsICZwcnYtPnRpY2tsZWQpOwogCi0gICAgLyogMSkgaWYgbmV3J3MgcHJldmlvdXMg Y3B1IGlzIGlkbGUsIGtpY2sgaXQgZm9yIGNhY2hlIGJlbmVmaXQgKi8KLSAgICBpZiAoIGlzX2lk bGVfdmNwdShjdXJyX29uX2NwdShuZXctPnZjcHUtPnByb2Nlc3NvcikpICkKLSAgICB7Ci0gICAg ICAgIFNDSEVEX1NUQVRfQ1JBTksodGlja2xlZF9pZGxlX2NwdSk7Ci0gICAgICAgIGNwdV90b190 aWNrbGUgPSBuZXctPnZjcHUtPnByb2Nlc3NvcjsKLSAgICAgICAgZ290byBvdXQ7Ci0gICAgfQot Ci0gICAgLyogMikgaWYgdGhlcmUgYXJlIGFueSBpZGxlIHBjcHUsIGtpY2sgaXQgKi8KKyAgICAv KiAxKSBpZiB0aGVyZSBhcmUgYW55IGlkbGUgcGNwdSwga2ljayBpdCAqLwogICAgIC8qIFRoZSBz YW1lIGxvb3AgYWxzbyBmaW5kIHRoZSBvbmUgd2l0aCBsb3dlc3QgcHJpb3JpdHkgKi8KLSAgICBm b3JfZWFjaF9jcHUoY3B1LCAmbm90X3RpY2tsZWQpCisJLyogRm9yIGNhY2hlIGJlbmVmaXQsIHdl IHNlYXJjaCBuZXctPmNwdSBmaXJzdCAqLworICAgIGNwdSA9IGNwdW1hc2tfdGVzdF9vcl9jeWNs ZShuZXctPnZjcHUtPnByb2Nlc3NvciwgJm5vdF90aWNrbGVkKTsKKyAgICB3aGlsZSAoIGNwdSAh PSBucl9jcHVfaWRzICkKICAgICB7CiAgICAgICAgIGl0ZXJfdmMgPSBjdXJyX29uX2NwdShjcHUp OwogICAgICAgICBpZiAoIGlzX2lkbGVfdmNwdShpdGVyX3ZjKSApCkBAIC0xMTk3LDkgKzExOTIs MTIgQEAgcnVucV90aWNrbGUoY29uc3Qgc3RydWN0IHNjaGVkdWxlciAqb3BzLCBzdHJ1Y3QgcnRf dmNwdSAqbmV3KQogICAgICAgICBpZiAoIGxhdGVzdF9kZWFkbGluZV92Y3B1ID09IE5VTEwgfHwK ICAgICAgICAgICAgICBpdGVyX3N2Yy0+Y3VyX2RlYWRsaW5lID4gbGF0ZXN0X2RlYWRsaW5lX3Zj cHUtPmN1cl9kZWFkbGluZSApCiAgICAgICAgICAgICBsYXRlc3RfZGVhZGxpbmVfdmNwdSA9IGl0 ZXJfc3ZjOworCisgICAgICAgIGNwdW1hc2tfY2xlYXJfY3B1KGNwdSwgJm5vdF90aWNrbGVkKTsK KyAgICAgICAgY3B1ID0gY3B1bWFza19jeWNsZShjcHUsICZub3RfdGlja2xlZCk7CiAgICAgfQog Ci0gICAgLyogMykgY2FuZGljYXRlIGhhcyBoaWdoZXIgcHJpb3JpdHksIGtpY2sgb3V0IGxvd2Vz dCBwcmlvcml0eSB2Y3B1ICovCisgICAgLyogMikgY2FuZGljYXRlIGhhcyBoaWdoZXIgcHJpb3Jp dHksIGtpY2sgb3V0IGxvd2VzdCBwcmlvcml0eSB2Y3B1ICovCiAgICAgaWYgKCBsYXRlc3RfZGVh ZGxpbmVfdmNwdSAhPSBOVUxMICYmCiAgICAgICAgICBuZXctPmN1cl9kZWFkbGluZSA8IGxhdGVz dF9kZWFkbGluZV92Y3B1LT5jdXJfZGVhZGxpbmUgKQogICAgIHsKLS0gCjEuOS4xCgotLS0KQ0M6 IDxtZW5neHVAY2lzLnVwZW5uLmVkdT4KQ0M6IDxkYXJpby5mYWdnaW9saUBjaXRyaXguY29tPgoK X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KWGVuLWRldmVs IG1haWxpbmcgbGlzdApYZW4tZGV2ZWxAbGlzdHMueGVuLm9yZwpodHRwczovL2xpc3RzLnhlbi5v cmcveGVuLWRldmVsCg==